How I approach problem solving in code?
Recently I was posed the following question: Write a piece of code that prints all odd integer numbers between 1 and 99 This really isn't a difficult question but it still requires some thought. When I'm posed with any question I like to break things down into their constituent parts. Here's the process I went through: Okay, so I'll define two variables for a start and end value and there's going to have to be a loop. [csharp]int startValue = 1; int endValue = 99; for(int i = startValue; i lt;= endValue; i++) { // work out if i is an odd number }[/csharp] Now, for the odd number detection. And... after a few umms and errrs ... I'm going to have to mod 2 ( %2 ) the current value of i to work out if the value is odd. More ... umms and errs. Okay, I've finally worked out that if something mod 2 is not equal to 0 it's clearly an odd number. This took me longer than it should have but never mind. Once I've detected if i is an odd number I'll then put the odd number into a list for use later. [csharp] int startValue = 1; int endValue = 99; IList int oddValues = new List lt;int gt;(); for(int i = startValue; i lt;= endValue; i++) { if(i%2 != 0) { oddValues.Add(i); } } [/csharp] Those of you that are good at these little puzzles, or just think this is way too easy, might already be screaming at me about one of the following: Why are you using a IList , why don't you just print the value? Odd numbers are always 2 apart so why aren't you just increment i by 2 using i+=2 ?